.login_Div {
    position: fixed;
    width: 450px;
    height: 400px;
    padding: 5px;
    margin: 0;
    top: 50%;
    left: 50%;
    z-index: 9999;
    border-radius: 5px;
    background-color: #FFF;
    box-shadow: 0 5px 12px rgba(15,27,39,.4);
    transform: translateX(-50%) translateY(-50%);
}
.mask_Div {
	position: fixed;
	overflow: hidden;
	top: 0;
	right: 0;
	bottom: 0;
	left: 0;
	z-index: 999;
	background: rgba(26,53,71,.85);
}
.btn-wechat {
    color: #FFF;
    background-color: #2EB02F;
}
.btn-wechat:hover,
.btn-wechat:focus {
    color: #2EB02F;
    border-color: #2EB02F;
    background-color: #FFF;
}
.btn-qq {
    color: #FFF;
    background-color: #70A9DD;
}
.btn-qq:hover,
.btn-qq:focus {
    color: #70A9DD;
    border-color: #70A9DD;
    background-color: #FFF;
}
.btn-weibo {
    color: #FFF;
    background-color: #dc3246;
}
.btn-weibo:hover,
.btn-weibo:focus {
    color: #dc3246;
    border-color: #dc3246;
    background-color: #FFF;
}
@media only screen and (max-width: 768px) {
	.login_Div {
		width: 100%;
		height: 100%;
	}
}
